EP0435977B1 - Streuvorrichtung - Google Patents

Streuvorrichtung Download PDF

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Publication number
EP0435977B1
EP0435977B1 EP90909666A EP90909666A EP0435977B1 EP 0435977 B1 EP0435977 B1 EP 0435977B1 EP 90909666 A EP90909666 A EP 90909666A EP 90909666 A EP90909666 A EP 90909666A EP 0435977 B1 EP0435977 B1 EP 0435977B1
Authority
EP
European Patent Office
Prior art keywords
section
throwing
shovel
spreading
outer section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90909666A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0435977A1 (de
Inventor
Johan Jansen
Johannes Sebulke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ing Alfred Schmidt GmbH
Original Assignee
Ing Alfred Schmidt GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ing Alfred Schmidt GmbH filed Critical Ing Alfred Schmidt GmbH
Priority to AT90909666T priority Critical patent/ATE87686T1/de
Publication of EP0435977A1 publication Critical patent/EP0435977A1/de
Application granted granted Critical
Publication of EP0435977B1 publication Critical patent/EP0435977B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H10/00—Improving gripping of ice-bound or other slippery traffic surfaces, e.g. using gritting or thawing materials ; Roadside storage of gritting or solid thawing materials; Permanently installed devices for applying gritting or thawing materials; Mobile apparatus specially adapted for treating wintry roads by applying liquid, semi-liquid or granular materials
    • E01H10/007—Mobile apparatus specially adapted for preparing or applying liquid or semi-liquid thawing material or spreading granular material on wintry roads

Definitions

  • the invention relates to a spreading device for distributing granulated spreading material moistened with a liquid, which is applied centrally to a spreading disc rotating about a vertical axis, the upper side of which is provided with approximately radially extending throwing blades.
  • Such a spreading device is described in DE-A-30 50 355.
  • the spreading disc used there has on its upper side radially extending throwing blades with a constant blade height, the upper edge of which is bent towards the loading side.
  • the bent blade edge has the task of bundling the spreading material gripped by the throwing blade before it leaves the spreading plate. While the spreading material flows through the throwing blades in the radial direction, vertical vibrations of the spreading material particles also occur as a result of the rotation pulse, so that the spreading material beam runs in a wave shape. The consequence of this is an uncontrolled spreading of the spreading material from the throwing vane and thus an irregular spreading pattern.
  • the present invention has for its object to generate a bundle of scattering material when it emerges from the blades by a suitable structural design of the throwing blades, which is parallel to the plane of the spreading plate.
  • this object is achieved in a first variant by that the throwing blades each have an approximately semicircular cross-section which is open towards their loading side, that a radial inner section of each throwing blade is designed as a mixing section with a blade height that decreases in the radial direction toward the outside, and that a radial outer section of each throwing blade is designed as a calming section with a substantially constant blade height, which corresponds to that at the exit of the mixing section.
  • the throwing blades each have an approximately semicircular cross-section which is open towards their loading side, that a radial inner section of each throwing blade is designed as a mixing section with a blade height that assumes an outward radial direction and that a radial outer section of each throwing blade is designed as a calming section that extends the inner section, the length of the outer section being three to eight times the blade height at the outlet of the inner section.
  • the semicircular blade cross-section enables a particularly violent transverse vibration of the spreading material particles in the area of the mixing section, the vertical component of which is particularly pronounced due to the blade shape and the rotational movement.
  • This vibration is used for the intimate mixing of the dry granulated thawing material with the liquid which is only added to the spreading disc immediately before it is applied.
  • a corresponding reduction results from the reduction of the blade height in the area of the mixing section Reduction of the passage cross section and thus an increasing damping effect on the spreading material, so that its vibration amplitudes decrease rapidly. Only in the area of the calming section that adjoins in the radial direction does the transverse oscillation come to a virtually complete standstill in relation to the radial transport direction.
  • a certain length of the calming section is particularly conducive to this. It is sufficient if, in a preferred variant, the outer section of the throwing blade has a constant blade height, ie it is not necessary for the blade cross-section to decrease progressively towards the blade end.
  • a scattering material jet is formed in the center of the throwing blade, which runs in a straight line and also emerges in a straight line from the throwing blade, which allows large throwing distances which are stable against wind influences before it dissolves, so that a regular, repeatable spread pattern can be achieved.
  • the blade shape according to the invention thus combines an increase in the mixing effect with an improvement in the scatter pattern, both objectives which are generally prerequisites for one economical and yet effective use of grit can be recognized.
  • brine and salt crystals result from the fact that the length of the outer section is at least 3 times its blade height. 5 to 8 times the blade height represents a particularly favorable configuration.
  • This embodiment entails that the end sections of the throwing blades protrude beyond the edge of a conventional spreading disc. However, this has no negative influence on the function of the spreading device.
  • the upper edge area of the outer section is cut out toward the end of the blade.
  • an additional improvement in the mixing effect is achieved in that an upwardly conically tapered impact body is arranged in a rotationally fixed manner in the center of the spreading plate and that the adjacent ends of the Throwing blades are arranged at a distance from the plate-side circumference of the impact body.
  • the dimensions of the throwing blades depend on the type of material to be spread, namely its density, grain size, liquid content or the like. It is essential, however, that the throwing blade height in the entrance area of the measuring section is clearly above the requirements for maximum spreading material throughput, while the throwing paddle height in the area of the calming section just allows the unhindered spreading material to pass through. In this way, a straight stream of scattering material is achieved.
  • the figures of the drawing show an exemplary embodiment of a throwing scoop 1, approximately on a scale of 1: 2.
  • the cross-sectional profile of the throwing vane from the inside to the outside is illustrated by the sections A, B and C to the associated section planes A-A, B-B and C-C shown in FIG. 1.
  • the sectional plane B-B corresponds to a transition plane Ü between an inner section 2 and an outer section 3 of the throwing blade 1.
  • the inner section 2 which acts as a so-called mixing section
  • there are still violent transverse vibrations in the material flow in the area of the outer section 3, the so-called calming section, these transverse vibrations are damped, so that a straight-line scattering material jet is created through the outlet cross section of the throwing blade 1 S exits.
  • FIG. 2 which shows the throwing blade 1 in a side view with a view into the blade cavity, is shown schematically, namely by a dash-dotted line L, the course of a grit particle in the grit jet between the inlet cross section E and the outlet cross section F of the throwing blade 1.
  • the loops of the line L in the interior of the throwing scoop 1 correspond approximately to the amplitudes of an oscillation running transversely to the emerging scattering material beam S. In the area of the inner section 2, this leads to increased mixing of the two grit components, for example brine and de-icing salt.
  • a not yet homogeneous mixture of these two components arrives from a chute (not shown) in the annular space between the inlet cross section E of the throwing blades 1 and a conical impact body 4, which is fastened centrally on a flat spreading plate 5.
  • the latter, as well as the impact body 4 are indicated by dashed lines.
  • the plane of the spreading plate 5 extends obliquely to its axis of rotation R, in such a way that the top of the spreading plate 5 encloses an angle with the axis of rotation R that is slightly below 90 ° (for example 84 °). Only for the sake of simplifying the drawing, a scatter plate 5 running perpendicular to the axis of rotation R has been shown.
  • the length of the throwing blades is approximately 280 mm
  • the radius of the spreading disc is approximately 300 mm
  • the throwing blades being arranged such that their end portions 7 protrude about 50 mm beyond the edge of the spreading disc.
  • the transverse vibration comes to a complete standstill very quickly, so that the scattering material jet rotating in the manner of a roller leaves the throwing blade horizontally or in the inclination of the spreading disc 5.
  • the spreading material jet By influencing the spreading material jet, it is possible to generate a bundled spreading material jet that is suitable for large throwing distances with a uniform throwing pattern.
  • the particles forming the scattering material jet are given a swirl, which additionally stabilizes the scattering material jet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Road Paving Machines (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP90909666A 1989-07-26 1990-06-15 Streuvorrichtung Expired - Lifetime EP0435977B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90909666T ATE87686T1 (de) 1989-07-26 1990-06-15 Streuvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3924656 1989-07-26
DE3924656A DE3924656C1 (enrdf_load_stackoverflow) 1989-07-26 1989-07-26

Publications (2)

Publication Number Publication Date
EP0435977A1 EP0435977A1 (de) 1991-07-10
EP0435977B1 true EP0435977B1 (de) 1993-03-31

Family

ID=6385833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90909666A Expired - Lifetime EP0435977B1 (de) 1989-07-26 1990-06-15 Streuvorrichtung

Country Status (3)

Country Link
EP (1) EP0435977B1 (enrdf_load_stackoverflow)
DE (2) DE3924656C1 (enrdf_load_stackoverflow)
WO (1) WO1991002123A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043462C2 (de) * 2000-09-04 2003-05-28 Kuepper Weisser Gmbh Winterdienst-Streugerät und Streuteller für Winterdienst-Streugerät

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261520A (en) * 1979-11-09 1981-04-14 Meyer Products, Inc. Hopper device for material spreader having a multi-positionable cover
DE3050355C2 (de) * 1980-09-19 1984-03-29 Willy 7715 Bräunlingen Küpper Streuvorrichtung für granulierte und flüssige Taustoffe
US4491275A (en) * 1982-06-28 1985-01-01 Herbert Holsworth Dispenser for road vehicle
DE8901867U1 (de) * 1989-02-17 1989-04-06 Klenner, Günther, 8201 Riedering Kombistreuteller

Also Published As

Publication number Publication date
DE3924656C1 (enrdf_load_stackoverflow) 1991-01-03
EP0435977A1 (de) 1991-07-10
WO1991002123A1 (de) 1991-02-21
DE59001125D1 (de) 1993-05-06

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